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DOI: https://doi.org/10.3402/tellusa.v20i3.10020 | Journal eISSN: 3035-9554
Language: English
Page range: 417 - 421
Submitted on: Aug 14, 1967
Published on: Jan 1, 1968
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services
© 1968 Rumen D. Bojkov, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.